USB hub



FIG. 1 is a left, rear perspective view of a USB hub showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof and the right side elevation view is the mirror image of FIG. 4 due to symmetry;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a USB hub, as shown and described. 